海口地区火山活动初步研究
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摘要
海口地区的马鞍岭-雷虎岭火山群是中国为数不多的几个休眠火山群之一。通过对区域火山活动期次划分、深部岩浆囊探测以及对火山类型、规模、物质组成和溶岩覆盖面积的分析,总结了海口地区火山活动的时、空、强特征。结合对火山区地震、地磁、体应变和地热等观测资料的分析,对火山区深部岩浆活动的状态进行了初步评估。研究认为海口全新世火山区最后一次火山喷发距今约4 000a左右,其现今火山活动已趋于平静,未来的火山活动可能向1605年琼州7.5级大地震震中区迁移。
The Maanling-Leihuling volcanic cluster in Haikou area is one of the few dormant volcanic clusters in China.In the present study,according to the active stages division,deep magma chamber detection in this area,as well as the investigation of volcano types,scales,material composition and lava cover area,we evaluated the spatial-temporal and intensity features of volcanic activity in this region. Combined with the analysis on the observations of earthquake,geomagnetism,volumetric strain and geothermics in this volcanic region,we made the preliminary assessment on the activity state of deep magma.The results indicate that the last eruption in this Holocene volcano region occurred 4000 a BP,and the future volcanic activity may shift to the epicentre area of the 1605 M7.5 Qiongzhou earthquake in the Hainan Island.
The Maanling-Leihuling volcanic cluster in Haikou area is one of the few dormant volcanic clusters in China.In the present study,according to the active stages division,deep magma chamber detection in this area,as well as the investigation of volcano types,scales,material composition and lava cover area,we evaluated the spatial-temporal and intensity features of volcanic activity in this region. Combined with the analysis on the observations of earthquake,geomagnetism,volumetric strain and geothermics in this volcanic region,we made the preliminary assessment on the activity state of deep magma.The results indicate that the last eruption in this Holocene volcano region occurred 4000 a BP,and the future volcanic activity may shift to the epicentre area of the 1605 M7.5 Qiongzhou earthquake in the Hainan Island.
引文
白志达,徐德斌,魏海泉,等.2003.琼北马鞍岭地区第四纪火山活动期次划分[J].地震地质,25(增刊):12- 20.
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胡久常,白登海,王薇华,等.2007a.琼州7.5级地震区深部电性异常及地震活动性研究[J].地震学报,29 (3):258-264.
HU Jiu-chang,BAI Deng-hai,WANG Wei-hua,et al.2007a.Deep electrical anomaly in M7.5 Qiongzhou earthquake region and its relation with future seismicity[J].Acta Seismological Sinica,29(3):258-264(in Chinese).
胡久常,白登海,王薇华,等.2007b.雷琼火山区地下深部大地电磁探测与电性结构分析[J].华南地震,27 (1):1-7.
HU Jiu-chang,BAI Deng-hai,WANG Wei-hua,et al.2007b.M agnetotelluric surveying and electrical structure of the deep underground part in Leiqiong volcanic area[J].South China Journal of Seismology,27(1 ):1-7(in Chinese).
洪汉净,吴建平,王庆良,等.2007.中国火山危险性等级与活动性分类[J].地震地质,29(3):447-458.
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李玉锁,修济刚,李继泰,等编著.1998.火山喷发机制与预报[M].北京:地震出版社.95-110.
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刘若新主编.2000.中国活火山[M].北京:地震出版社.75-81.
LIU Ruo-xin(ed).2000.Active Volcanoes of China[M].Seismological Press,Beijing.75-81(in Chinese).
刘昭蜀,赵焕庭,范时清,等著.2002.南海地质[M].北京:科学出版社.153-157.
LIU Zhao-shu,ZHAO Huan-ting,FAN Shi-qin,et al.2002.Geology of the South China Sea[M].Science Press,Beijing. 153-157(in Chinese).
魏海泉,白志达,胡久常,等.2003.琼北全新世火山区火山系统的划分与锥体结构参数研究[J].地震地质,25 (增刊):21-32.
WEI Hai-quan,BAI Zhi-da,HU Jiu-chang,et al.2003.Nomenclature of the Holocene volcanic systems and research on the textural parameters of the scoria cones in northern Hainan island[J].Seismology and Geology,25(Suppl): 21-32(in Chinese).
王颖,周旅夏.1990.海南岛西北部火山海岸的研究[J].地理学报,45(3):338-347.
WANG Ying,ZHOU L(u|¨)-xia.1990.Research on volcanic coast in the western Hainan island[J].Acta Geographica Sinica,45(3):338-347(in Chinese).
BAI Zhi-da,XU De-bin,WEI Hai-quan,et al.2003.Division of the active period of Quaternary volcanism in Maanling, northern Hainan Province[J].Seismology and Geology,25(Suppl):12-20(in Chinese).
胡久常,白登海,王薇华,等.2007a.琼州7.5级地震区深部电性异常及地震活动性研究[J].地震学报,29 (3):258-264.
HU Jiu-chang,BAI Deng-hai,WANG Wei-hua,et al.2007a.Deep electrical anomaly in M7.5 Qiongzhou earthquake region and its relation with future seismicity[J].Acta Seismological Sinica,29(3):258-264(in Chinese).
胡久常,白登海,王薇华,等.2007b.雷琼火山区地下深部大地电磁探测与电性结构分析[J].华南地震,27 (1):1-7.
HU Jiu-chang,BAI Deng-hai,WANG Wei-hua,et al.2007b.M agnetotelluric surveying and electrical structure of the deep underground part in Leiqiong volcanic area[J].South China Journal of Seismology,27(1 ):1-7(in Chinese).
洪汉净,吴建平,王庆良,等.2007.中国火山危险性等级与活动性分类[J].地震地质,29(3):447-458.
HONG Han-jing,WU Jian-ping,WANG Qing-liang,et al.2007.Volcanic threat levels and classification of volcanic activity in China[J].Seismology and Geology,29(3):447- 458(in Chinese).
黄镇国,蔡福祥,韩中元,等著.1993.雷琼第四纪火山[M].北京:科学出版社.
HUANG Zhen-guo,CAI Fu-xiang,HAN Zhong-yuan,et al.1993.Quaternary Volcanoes in Leizhou Peninsula and Northern Hainan Island[M].Science Press,Beijing(in Chinese).
李玉锁,修济刚,李继泰,等编著.1998.火山喷发机制与预报[M].北京:地震出版社.95-110.
LI Yu-suo,XIU Ji-gang,LI Ji-tai,et al(eds).1998.Volcanic Eruption Mechanism and Forecast[M].Seismological Press,Beijing.95-110(in Chinese).
刘辉,洪汉净,冉洪流,等.2008.琼北火山群形成的动力学机制及地震现象的新认识[J].地球物理学报,51 (6):1804-1809.
LIU Hui,HONG Han-jing,RAN Hong-liu,et al.2008.Dynamic mechanism of volcanic belt and new understanding from earthquake evidence in Northern Hainan Island,China[J].Chinese J Geophys,51(6):1804-1809(in Chinese).
刘若新主编.2000.中国活火山[M].北京:地震出版社.75-81.
LIU Ruo-xin(ed).2000.Active Volcanoes of China[M].Seismological Press,Beijing.75-81(in Chinese).
刘昭蜀,赵焕庭,范时清,等著.2002.南海地质[M].北京:科学出版社.153-157.
LIU Zhao-shu,ZHAO Huan-ting,FAN Shi-qin,et al.2002.Geology of the South China Sea[M].Science Press,Beijing. 153-157(in Chinese).
魏海泉,白志达,胡久常,等.2003.琼北全新世火山区火山系统的划分与锥体结构参数研究[J].地震地质,25 (增刊):21-32.
WEI Hai-quan,BAI Zhi-da,HU Jiu-chang,et al.2003.Nomenclature of the Holocene volcanic systems and research on the textural parameters of the scoria cones in northern Hainan island[J].Seismology and Geology,25(Suppl): 21-32(in Chinese).
王颖,周旅夏.1990.海南岛西北部火山海岸的研究[J].地理学报,45(3):338-347.
WANG Ying,ZHOU L(u|¨)-xia.1990.Research on volcanic coast in the western Hainan island[J].Acta Geographica Sinica,45(3):338-347(in Chinese).
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